diff --git a/README.md b/README.md
index 347f486408..800be85bed 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,13 @@
 # GoogleApis
 
+# ⚠️ DEPRECATION NOTICE ⚠️
+
+This repository has been formally archived and is no longer actively
+maintained. The client libraries provided here are provided "as-is" without
+support or guarantees of future updates.
+
+---
+
 This repository contains all the client libraries to interact with Google APIs.
 These client libraries are created under `clients/` and each should contain its
 own README.